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Ekholm A, Fridqvist S

Ob ject-oriented caad' - design object structure, and models for buildings, user organisation and site

Abstract: In the early stages of the building design process not only building and site but also user activities and experiences are fonned. In this project conceptual models of some fundamental characteristics of building, site and user organisation will be developed and implemented in a prototype CAD-programme. The programming work for the prototypes is done with Smalltalk on Macintosh computers. The tests of the prototype includes spatial coordination of the three systems. The models are based on an ontological framework which is also used for organising the basic object structure of the prototype CAD program. In the design process, information about the design object is gradually developed. Starthg from certain desired properties, the whole and its parts are fonned by successive increase of detail. The project investigates how the data structure of the design object can be formed to serve this working method. The project also discusses possible future developments. One important question is how these models maybe used in the development of the brief and in the building management stage.

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Series: w78:1995 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.software development (0.034496) class.analysis (0.018928) class.represent (0.014989)
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Permission to reproduce these papers has been graciously provided by the Stanford University, USA. The support of the editors, particularly Prof. Fischer is gratefully appreciated.


Jan Tulke, Jochen Hanff

4D construction sequence planning – new process and data model

Abstract: Model based working is only just getting introduced in the construction sector to support design and pro-ject management. In particular, construction sequence planning as one of the key processes in a construction project can benefit from model based working. Since the time schedule defines sequences of activities and allocates resources such as material and labour, it plays an important role in optimizing and managing a construction project. In this respect, model based working can offer more to construction sequence planning than just a visualisation of the construction sequences, in which the term ‘4D simulation’ is today commonly understood. Still, available 4D simulation software packages do not engage in the scheduling work but require major additional effort after the time schedule has been finished. The links between the objects of the 3D CAD model and the activities of the time schedule have to be established manually, i.e. the user has to select certain objects and assign them to a related activity in the time schedule. Furthermore, a 4D simulation merely adds limited value due to a restriction to visualisa-tion of construction sequences only. This additional effort for creating the 4D simulation and limited benefit of having a visualisation of construction se-quences only, seem to be the main drawbacks as a result of which 4D simulation still has not crossed the threshold to daily practice. To significantly improve the efficiency of creating a 4D simulation this article presents a solution for creating time schedules and 4D simulations based on data stored in a building model.

Keywords: 4D simulation, scheduling, construction planning, model based planning, building information model

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Series: w78:2007 (browse)
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Robert Klinc

Comparison of distance learning courses: A/E/C computer integrated global teamwork course and ITC euromaster

Abstract: Even though advances in information and communication technologies (ICT) significantly changed the way professionals in building and construction (BC) industry work, the dominant training method is still the traditional classroom lecture with all its drawbacks. In response to the demands from the AEC sector to improve and broaden the competence of engineering students in using new technologies while solving specific problems, in 1993 University of Stanford (USA) started an ICT supported distance learning course named Architecture/Engineering/Construction Computer Integrated Global Teamwork Course (AEC Global Teamwork). The mission of the program is to educate the next generation of professionals to be able to work in multi discipline collaborative environments and to take advantage of information technologies to produce high quality products in faster and more economic way. Positive feedback of the AEC Global Teamwork encouraged other institutions to introduce their own BC oriented dis-tance learning courses, one of them being ITC Euromaster. In autumn 2001, nine European universities started the pro-ject in order to develop an inter university postgraduate programme in information technology in construction (ITC). This paper describes similarities and differences of both approaches, presents results of the survey carried out among participants of both courses, and compares both of them from the students’ point of view.

Keywords: engineering education, distance learning, PBL, ITC Euromaster

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